Birch bark processing and the isolation of natural products from birch bark
AssigneeRegents of the University of Minnesota
InventorsPavel A. Krasutsky, Robert M. Carlson, Vitaliy V. Nesterenko, Igor M. Kolomitsyn, Chris F. Edwardson
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Abstract
The invention provides methods for separating outer birch bark from inner birch bark. The invention also provides methods for isolating betulin; lupeol; betulinic acid; 9,10-epoxy-18-hydroxyoctadecanoic acid; 9,10,18-trihydroxyoctadecanoic acid; polyphenolic polymers and fatty acids from birch bark.
Claims4
A process for separating outer birch bark from inner birch bark comprising subjecting birch bark to fragmentation to provide a combination of outer birch bark shreds and inner birch bark chunks and separating the outer birch bark shreds from the inner birch bark chunks.
Dependencies are inferred from the claim text.